20010312 has 48 divisors (see below), whose sum is σ = 61938240. Its totient is φ = 5717088.

The previous prime is 20010307. The next prime is 20010313. The reversal of 20010312 is 21301002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20010294 and 20010303.

It is not an unprimeable number, because it can be changed into a prime (20010313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19348 + ... + 20355.

It is an arithmetic number, because the mean of its divisors is an integer number (1290380).

Almost surely, 2^20010312 is an apocalyptic number.

It is an amenable number.

20010312 is an abundant number, since it is smaller than the sum of its proper divisors (41927928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20010312 is a wasteful number, since it uses less digits than its factorization.

20010312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39722 (or 39715 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20010312 is about 4473.2887230761. The cubic root of 20010312 is about 271.4884054347.

Adding to 20010312 its reverse (21301002), we get a palindrome (41311314).

The spelling of 20010312 in words is "twenty million, ten thousand, three hundred twelve".